DOI: 10.1016/j.atmosenv.2015.03.006
Scopus记录号: 2-s2.0-84924373764
论文题名: Use of isotopic compositions of nitrate in TSP to identify sources and chemistry in South China Sea
作者: Xiao H ; -W ; , Xie L ; -H ; , Long A ; -M ; , Ye F ; , Pan Y ; -P ; , Li D ; -N ; , Long Z ; -H ; , Chen L ; , Xiao H ; -Y ; , Liu C ; -Q
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 109 起始页码: 70
结束页码: 78
语种: 英语
英文关键词: Atmospheric chemical process
; Isotopic fractionation
; Nitrate
; Nitrogen isotope
; Oxygen isotope
; South China Sea
Scopus关键词: Atmospheric chemistry
; Isotopes
; Nitrates
; Nitrogen
; Oxygen
; Chemical process
; Isotopic fractionations
; Nitrogen isotopes
; Oxygen isotopes
; South China sea
; Coal combustion
; coal
; nitrate
; nitrogen
; nitrogen 15
; oxidizing agent
; oxygen
; oxygen 18
; anthropogenic source
; atmospheric chemistry
; atmospheric pollution
; coastal zone
; concentration (composition)
; isotopic composition
; isotopic fractionation
; marine atmosphere
; nitrate
; oxidation
; oxygen isotope
; suspended particulate matter
; Article
; combustion
; nitrogen deposition
; priority journal
; sea
; seashore
; season
; suspended particulate matter
; total suspended particulate
; Pacific Ocean
; Paracel Islands
; South China Sea
; Yongxing Island
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: NO3 - concentration, nitrogen and oxygen isotopic compositions (δ15N and δ18O) of NO3 - were measured in total suspended particulates (TSP) at Yongxing Island in the South China Sea (SCS) between Feb. 2013 and Jan. 2014, as well as on two cruises in the northern South China Sea (NSCS). Measurements aimed to identify NO3 - sources, and possible chemical formation processes of NO3 -. The δ15N and δ18O of NO3 - in TSP at Yongxing Island ranged from-2.5 to+4.9‰, and+48.1 to+99.0‰, with annual weighted averages of+1.5‰ and+83.2‰, respectively. Both δ15N and δ18O had higher values in cool months, indicating that NOx sources and oxidants were different between seasons. In cool months, NOx was mainly from anthropogenic sources, particularly from coal combustion in South China, resulting in high nitrogen deposition that was oxidized by O3 to NO3 -. In warm months, natural emissions were an important source of NOx. TSP samples in the NSCS had higher NO3 - concentrations, higher δ15N and lower δ18O values than samples from Yongxing Island over the same period. This suggests that atmospheric processes caused a decrease in NO3 - concentrations and δ15N but increase in δ18O from coast to remote marine. Assuming to oxygen atoms were derived from O3 during transport in cool months, the mean ratio of NO3 - formed by NOx to total NO3 - was calculated to be 47.9%. This suggests the mean loss ratio of NOx was 89% while the loss ratio of NO3 - was 87% during transport between Chinese coastal areas and Yongxing Island in Nov., 2013. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81845
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Xisha Deep Sea Marine Environment Observation and Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Sansha, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
Recommended Citation:
Xiao H,-W,, Xie L,et al. Use of isotopic compositions of nitrate in TSP to identify sources and chemistry in South China Sea[J]. Atmospheric Environment,2015-01-01,109